Improvement in burglar-alarms



w. w. Emu. E. T. &1. T. GILLILAND.

Burglar-Alarm.

P10162239. Patented April 20,1875.

THE GRAPHIC C0.PHOTO.-LITH.39&4I PARK PLQG JLY r rrrca WILLIAM YV.KENNOUH, OF NEW YORK, N. Y., AND EZRA T. GILLILAND AND JAMES F.GILLILAND, OF CINCINNATI, OHIO.

IMPROVEMENT IN BURGLAR-ALARMS.

Specification forming part of Letters Patent No. 162,239, dated April20, 1875; application filed October 28, 1874.

To all whom it may concern:

Be it known that we, WILLIAM W. KEN- NOOH, of New York city, State ofNew York, and EZRA T. GILLILAND and JAMES F. GIL- LILAND, both ofCincinnati, Hamilton county, and State of Ohio, have jointly invented acertain new and useful Improvement in Burglar- Alarms, of which thefollowing is a speciiica tion:

Our invention relates to a class of burglaralarms which perform theirfunctions by eX- plodin g a blank cartridge when it is attempted to opena door or window to which one was applied; and consists of thehereinafter-described construction and arrangement of a hinged hammer,spring-connection for actuating the same, and a socket for holding thecartridge.

The object of the invention is, mainly, to provide for great delicacy ofadjustment, so that a very slight movement of the door or window willtrip the hammer.

Figure l is a sectional View of my invention secured to a door-post, andin condition for use. Fig. 2 is a sectional view of a modified form ofmy invention, discharged by the opening door.

A is the shell of the alarm, having a permanent screw shank or cork, a,for securing it to the jamb or post of a door. The shell may, however,be secured by a common screwpoint. B is a hinged hammer, secured at oneend of the shell, and having a striking-lug, 1), whose curved line ofstrike is directly against the side of a cartridge-socket, O, on theshell A. As a means of concussive power between the hammer B and socketO, we provide a spring-connection, D, which may he a spring, secureddirectly to the hammer B, as shown in Fig. 2; or it may have alink-connection, d, as shown in Fig. 1.

When the spring has a direct connection with the hammer B, Fig. 2, Weprovide the stop a to prevent it from going too far but when we use thelink d it, from its peculiar shape and connection, will of itselfprevent any such injurious action, for when the hammer is cooked thelink will pull upon it on a line passing through the center of the pivotof the hammer in the longitudinal direction thereof, so as to in amanner lock it.

After a blank cartridge has been placed in socket C it is onlynecessaryto trip the hammer past its center of rest, when it willimmediate] y strike the cartridge with sufficient force to explode it;and when placed upon the jamb of the door, as shown in Fig. 2, will dothis upon the slightest opening of the door. It is obvious that it canbe secured so as to be tripped by an opening window, or other means ofentrance to a house. They can be secured permanently upon the jamb of adoor, or they may be taken 011' and carried in the pocket, in which lastmanner they may be used by traveling agents or pleasureseekers as ameans of protection on retiring for the night in any strange house.

We claim-- The combination of cartridgesocket O, hinged hammer B, linkd, and spring D, arranged and operating substantially as set forth,whereby greater delicacy of adjustment is secured, and a very slightmovement of the door or window will suffice to trip the hammer.

In testimony of which invention we hereunto set our hands.

VM. KENNOCH. EZRA T. GILLILAND. JAMES F- GILLILAND.

Witnesses:

J. L. WARTMANN, A. L. DRUMMOND.

